998913 has 16 divisors (see below), whose sum is σ = 1437696. Its totient is φ = 615120.

The previous prime is 998909. The next prime is 998917. The reversal of 998913 is 319899.

998913 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (998909) and next prime (998917).

It is not a de Polignac number, because 998913 - 2² = 998909 is a prime.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 998913.

It is not an unprimeable number, because it can be changed into a prime (998917) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1906 + ... + 2372.

It is an arithmetic number, because the mean of its divisors is an integer number (89856).

2⁹⁹⁸⁹¹³ is an apocalyptic number.

998913 is a gapful number since it is divisible by the number (93) formed by its first and last digit.

It is an amenable number.

998913 is a deficient number, since it is larger than the sum of its proper divisors (438783).

998913 is a wasteful number, since it uses less digits than its factorization.

998913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 524.

The product of its digits is 17496, while the sum is 39.

The square root of 998913 is about 999.4563522235. The cubic root of 998913 is about 99.9637535302.

The spelling of 998913 in words is "nine hundred ninety-eight thousand, nine hundred thirteen".